OSISKO INFILL DRILLING CONTINUES TO INTERSECT HIGH GRADE

415 g/t Au over 2.0 Metres

149 g/t Au Over 5.6 Metres

(Toronto, March 31, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new infill drilling results from the definition and expansion drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

The current program is focused on the Lynx deposit, exploration on the main mineralized zones, and deep exploration in the central areas of the mineralized system. Prior to the government mandated temporary shutdown related to the Covid-19 crisis, fifteen surface drills and four underground rigs on the exploration ramp were active at Lynx and Triple Lynx. Significant new analytical results from the infill program are presented below and include from 90 intercepts in 34 drill holes, 12 wedges, and 5 extensions of previous drill holes.

Selected high-grade intercepts from new results include: 149 g/t Au over 5.6 metres in OSK-W-20-2170-W2; 415 g/t Au over 2.0 metres and 85.7 g/t Au over 2.0 metres in OSK-W-20-2100-W7; 337 g/t Au over 2.0 metres and 243 g/t Au over 2.0 metres in WST-20-0295; 21.9 g/t Au over 18.1 metres and 36.9 g/t Au over 9.7 metres in OSK-W-19-1272-W4; 79.1 g/t Au over 2.2 metres and 61.2 g/t Au over 2.3 metres in OSK-W-20-1731-W5; 21.2 g/t Au over 6.0 metres in OSK-W-18-1739. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Infill Drilling

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)         cut to 100 g/t Zone Corridor
OSK-W-17-1121 701.4 703.6 2.2 5.77   Lynx_367 Lynx
OSK-W-17-1346 620.1 626.2 6.1 3.44   Lynx_365 Lynx
OSK-W-18-1733 1102.0 1104.5 2.5 7.59   Lynx_338 Lynx
including 1103.3 1103.7 0.4 29.2
OSK-W-18-1738 696.4 699.0 2.6 3.95   Lynx_367 Lynx
including 696.4 696.8 0.4 14.7
  706.0 708.3 2.3 3.21   Lynx_367 Lynx
  710.0 712.3 2.3 18.3   Lynx_367 Lynx
including 710.4 711.3 0.9 44.7
OSK-W-18-1739 703.0 709.0 6.0 21.2   Lynx_331 Triple Lynx
including 707.0 708.0 1.0 95.1
  722.0 726.0 4.0 5.41   Lynx_331 Lynx
including 725.0 726.0 1.0 16.1
  737.0 739.0 2.0 13.0   Lynx_331 Lynx
including 737.9 738.2 0.3 81.1
OSK-W-19-1166-W6 938.2 941.1 2.9 7.35   Lynx_330 Lynx
including 940.2 940.6 0.4 50.6
  960.5 962.9 2.4 49.4 28.9 Lynx_330 Lynx
including 961.5 962.1 0.6 182 100
OSK-W-19-1181-W12 1137.0 1139.0 2.0 3.15   Lynx_330 Lynx
OSK-W-19-1272-W4 763.5 772.0 8.5 8.56   Lynx_371 Lynx
including 763.5 764.0 0.5 48.8
  774.5 792.6 18.1 21.9 15.4 Lynx_361 Lynx
including 780.0 780.4 0.4 392 100
and 786.1 786.6 0.5 55.6
and 791.2 792.1 0.9 47.9
  839.9 849.6 9.7 36.9 26.4 Lynx_363 Lynx
including 841.0 841.8 0.8 227 100
and 848.0 849.0 1.0 61.0
  884.0 886.6 2.6 12.0   Lynx_364 Lynx
including 884.9 885.4 0.5 37.1
OSK-W-19-1731-W4 878.0 880.0 2.0 3.16   Lynx_313 Lynx
OSK-W-19-1897 848.0 851.0 3.0 4.37   Underdog_4100 Underdog
  860.0 862.3 2.3 19.0   Underdog_4100 Underdog
including 860.8 861.8 1.0 42.8
  892.0 894.0 2.0 6.96   Underdog_4102 Underdog
  983.3 985.6 2.3 6.35   Underdog_4511 Underdog
including 985.1 985.6 0.5 17.8
OSK-W-19-1903 205.6 208.0 2.4 3.35   Caribou_2506 Caribou
including 205.6 206.4 0.8 10.0
OSK-W-19-1995 424.1 427.3 3.2 4.19   Caribou_2534 Caribou
OSK-W-19-2059 863.8 866.7 2.9 7.07   Lynx_327 Lynx
including 865.4 865.7 0.3 43.0
OSK-W-19-2067-W2 1155.0 1157.0 2.0 4.49   Lynx_374 Triple Lynx
OSK-W-19-2077 797.0 799.0 2.0 4.35   Lynx_364 Triple Lynx
OSK-W-19-2119 129.3 132.1 2.8 8.26   F11_6000 F-11
  157.0 161.1 4.1 12.6   F11_6001 F-11
including 157.0 158.0 1.0 37.3
OSK-W-19-2139 887.9 890.0 2.1 3.81   Lynx_361 Triple Lynx
including 887.9 888.3 0.4 14.4
OSK-W-20-1072-W4 868.4 871.9 3.5 9.90   Lynx_330 Lynx
including 868.4 869.0 0.6 37.1
  928.0 930.2 2.2 11.7   Lynx_340 Lynx
including 928.0 928.3 0.3 32.9
OSK-W-20-1731-W5 547.5 549.7 2.2 79.1 15.4 Lynx_304 Lynx
including 549.4 549.7 0.3 567 100
  915.0 917.2 2.2 15.8   Lynx_329 Lynx
including 916.4 917.2 0.8 32.2
  923.0 925.3 2.3 61.2 13.4 Lynx_329 Lynx
including 923.8 924.1 0.3 466 100
OSK-W-20-1733-W1 979.0 981.0 2.0 18.6   Lynx_329 Lynx
including 979.9 980.2 0.3 64.0
OSK-W-20-2100-W7 923.0 925.0 2.0 85.7 55.7 Lynx_361 Lynx
including 923.6 924.0 0.4 186 100
and 924.3 925.0 0.7 137 100
  933.0 935.0 2.0 415 16.1 Lynx_361 Lynx
including 934.0 934.3 0.3 2760 100
  946.0 948.0 2.0 3.81   Lynx_361 Lynx
  959.0 962.0 3.0 6.58   Lynx_361 Lynx
  967.0 969.0 2.0 4.79   Lynx_363 Lynx
including 967.7 968.0 0.3 26.0
  979.0 981.6 2.6 7.05   Lynx_364 Lynx
including 981.0 981.6 0.6 20.8
OSK-W-20-2139-W5 891.1 894.6 3.5 4.93   Lynx_361 Lynx
including 891.1 891.5 0.4 27.7
  941.7 947.0 5.3 3.60   Lynx_364 Lynx
including 941.7 943.0 1.3 7.91
  1113.4 1115.9 2.5 3.12   Lynx_374 Triple Lynx
including 1114.4 1114.8 0.4 18.7
OSK-W-20-2170-W2 971.0 976.6 5.6 149 39.3 Lynx_363 Lynx
including 974.8 976.6 1.8 439 100
  1116.0 1118.0 2.0 13.8   Lynx_370 Triple Lynx
including 1116.9 1117.2 0.3 80.8
OSK-W-20-2202-W2 930.7 934.4 3.7 11.8   Lynx_361 Lynx
including 932.9 933.4 0.5 27.2
and 934.1 934.4 0.3 50.2
  949.0 951.0 2.0 15.4   Lynx_363 Lynx
including 950.0 950.3 0.3 81.1
  954.4 960.5 6.1 7.49   Lynx_363 Lynx
including 954.4 954.7 0.3 54.4
OSK-W-20-2237 133.0 135.3 2.3 3.80   Lynx_311 Lynx
including 133.0 133.5 0.5 14.8
OSK-W-20-2244 64.6 66.8 2.2 3.89   Lynx_304 Lynx
  108.7 111.0 2.3 21.5 20.1 Lynx_311 Lynx
including 109.5 109.9 0.4 108 100
OSK-W-20-2245 77.3 79.4 2.1 7.31   Lynx_304 Lynx
including 77.3 77.9 0.6 25.2
OSK-W-20-2246 62.0 64.0 2.0 10.7   Lynx_311 Lynx
including 62.3 62.9 0.6 35.5
OSK-W-20-2248 55.9 58.0 2.1 8.14   Lynx_311 Lynx
including 56.3 56.6 0.3 56.7
WST-19-0187 124.2 126.4 2.2 3.83   Z27_1115 Zone 27
including 125.8 126.1 0.3 18.1
WST-19-0234 119.0 121.0 2.0 10.8   Lynx_304 Lynx
including 120.7 121.0 0.3 67.4
WST-19-0235 69.6 71.6 2.0 25.4 23.5 Lynx_308 Lynx
including 70.3 70.6 0.3 113 100
  101.0 103.6 2.6 6.58   Lynx_320 Lynx
including 103.2 103.6 0.4 42.6
  118.8 121.1 2.3 7.89   Lynx_304 Lynx
including 120.6 121.1 0.5 30.3
WST-20-0282 48.0 50.0 2.0 7.53   Lynx_311 Lynx
WST-20-0290 103.0 105.1 2.1 7.92   Lynx_320 Lynx
including 103.0 103.8 0.8 19.9
WST-20-0295 134.0 136.0 2.0 243 20.6 Lynx_304 Lynx
including 134.5 134.9 0.4 1210 100
  142.0 144.0 2.0 337 17.9 Lynx_304 Lynx
including 142.4 142.7 0.3 2230 100
WST-20-0298 63.2 65.4 2.2 3.94   Lynx_311 Lynx
including 65.0 65.4 0.4 21.0
  135.7 137.8 2.1 21.8   Lynx_320 Lynx
including 136.7 137.5 0.8 56.9
WST-20-0331 85.0 87.8 2.8 8.41   Lynx_304 Lynx
including 87.0 87.8 0.8 24.8
WST-20-0333 94.0 96.1 2.1 4.33   Lynx_304 Lynx
including 95.6 96.1 0.5 17.9
WST-20-0334 60.0 62.0 2.0 4.53   Lynx_325 Lynx
  94.7 97.3 2.6 56.9 53.6 Lynx_304 Lynx
including 96.0 97.3 1.3 107 100
WST-20-0335 51.0 53.5 2.5 4.47   Lynx_303 Lynx
  117.3 119.5 2.2 5.16   Lynx_359 Lynx
including 118.0 118.7 0.7 16.0
WST-20-0336 50.4 56.0 5.6 3.97   Lynx_311 Lynx
including 50.4 51.4 1.0 8.12
and 55.0 56.0 1.0 11.0
  103.0 105.0 2.0 50.2 43.6 Lynx_323 Lynx
including 103.4 104.4 1.0 98.7 85.4
  121.9 124.0 2.1 21.7   Lynx_304 Lynx
including 122.4 122.9 0.5 74.2
WST-20-0338 74.5 76.7 2.2 4.23   Lynx_323 Lynx
including 74.5 75.3 0.8 9.99
  85.5 87.9 2.4 3.42   Lynx_304 Lynx
WST-20-0355 110.6 112.7 2.1 4.58   Lynx_304 Lynx
including 110.6 111.2 0.6 12.8
WST-20-0356 111.5 113.7 2.2 5.08   Lynx_304 Lynx
WST-20-0357 114.6 117.2 2.6 5.26   Lynx_323 Lynx
including 114.6 115.1 0.5 10.9
WST-20-0358 118.5 120.7 2.2 8.65   Lynx_323 Lynx
including 118.5 119.5 1.0 16.8
  127.5 130.0 2.5 38.2 17.4 Lynx_304 Lynx
including 128.7 129.1 0.4 230 100
WST-20-0360 108.0 110.0 2.0 18.7   Lynx_304 Lynx
including 108.6 108.9 0.3 86.6
  126.2 128.4 2.2 10.9   Lynx_359 Lynx
including 126.5 126.8 0.3 51.5
  129.6 131.7 2.1 5.11   Lynx_359 Lynx
WST-20-0361 113.0 115.2 2.2 4.02   Lynx_304 Lynx
  125.4 127.8 2.4 25.5 12.5 Lynx_359 Lynx
including 125.4 125.7 0.3 204 100
WST-20-0373 131.1 133.2 2.1 11.7   Lynx_304 Lynx
including 132.8 133.2 0.4 40.2
WST-20-0374 135.3 139.4 4.1 17.5   Lynx_304 Lynx
including 135.3 136.0 0.7 71.3
and 138.5 138.8 0.3 52.9
WST-20-0387 151.8 153.8 2.0 6.27   Lynx_304 Lynx
including 151.8 152.2 0.4 30.9

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

 

Drill hole location

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Elevation Section
OSK-W-17-1121 335 -64 783 453436 5434959 396 3575
OSK-W-17-1346 334 -64 858 453467 5435069 397 3650
OSK-W-18-1733 138 -51 1140 453329 5435466 406 3725
OSK-W-18-1738 329 -69 815 453460 5434986 396 3600
OSK-W-18-1739 125 -55 813 453133 5435354 416 3500
OSK-W-19-1166-W6 132 -59 1137 453621 5435638 405 4050
OSK-W-19-1181-W12 133 -58 1371 453789 5435790 401 4275
OSK-W-19-1272-W4 127 -60 1070 453246 5435535 412 3675
OSK-W-19-1731-W4 139 -51 975 453383 5435518 409 3800
OSK-W-19-1897 331 -57 1125 452535 5434405 403 2500
OSK-W-19-1903 330 -60 564 452470 5434382 400 2450
OSK-W-19-1995 336 -59 564 452818 5434775 397 2950
OSK-W-19-2059 131 -52 993 453446 5435477 400 3825
OSK-W-19-2067-W2 123 -53 1159 453241 5435697 416 3750
OSK-W-19-2077 127 -57 1123 453147 5435489 418 3575
OSK-W-19-2119 148 -45 282 452546 5436001 405 3300
OSK-W-19-2139 115 -52 1149 452980 5435549 420 3450
OSK-W-20-1072-W4 145 -57 1092 453612 5435532 399 4000
OSK-W-20-1731-W5 139 -51 1028 453383 5435518 409 3800
OSK-W-20-1733-W1 138 -51 1206 453329 5435466 406 3725
OSK-W-20-2100-W7 122 -47 1122 453093 5435726 419 3650
OSK-W-20-2139-W5 115 -52 1146 452980 5435549 420 3450
OSK-W-20-2170-W2 128 -59 1188 453425 5435657 413 3900
OSK-W-20-2202-W2 127 -54 1146 452999 5435606 424 3500
OSK-W-20-2237 337 -49 207 453267 5434960 398 3425
OSK-W-20-2244 330 -52 165 453235 5434970 398 3400
OSK-W-20-2245 321 -49 153 453235 5434970 398 3400
OSK-W-20-2246 329 -52 111 453236 5435001 399 3425
OSK-W-20-2248 328 -52 123 453215 5435006 398 3400
WST-19-0187 320 6 139 452118 5434606 187 2250
WST-19-0234 150 17 157 453216 5435114 224 3450
WST-19-0235 150 9 159 453216 5435114 224 3450
WST-20-0282 173 -16 82 453228 5435126 135 3475
WST-20-0290 140 2 223 453229 5435127 136 3475
WST-20-0295 131 -7 166 453229 5435127 136 3475
WST-20-0298 130 -36 184 453229 5435127 135 3475
WST-20-0331 137 -1 133 453411 5435230 114 3675
WST-20-0333 140 -24 136 453411 5435230 114 3675
WST-20-0334 140 -36 141 453411 5435230 113 3675
WST-20-0335 141 -42 142 453411 5435230 113 3675
WST-20-0336 134 -44 148 453411 5435230 113 3675
WST-20-0338 146 -12 112 453410 5435229 114 3675
WST-20-0355 145 -24 247 453450 5435265 116 3725
WST-20-0356 147 -14 142 453450 5435265 116 3725
WST-20-0357 143 -40 163 453450 5435265 115 3725
WST-20-0358 146 -43 168 453450 5435265 115 3725
WST-20-0360 151 -23 254 453450 5435265 116 3725
WST-20-0361 152 -28 295 453450 5435265 115 3725
WST-20-0373 155 -41 168 453493 5435287 116 3775
WST-20-0374 152 -45 175 453494 5435287 116 3775
WST-20-0387 152 -52 208 453494 5435287 116 3775

 

Lynx Zone

Mineralization in the Lynx zone is typically characterized by trace to 15% disseminated, clustered or stringer pyrite (locally up to 70%), local visible gold, trace to 3% sphalerite, chalcopyrite, and galena, local ptygmatic pyrite-tourmaline or tourmaline veinlets, quartz-carbonate veins (locally crustiform), smoky quartz veins and veinlets, and local chlorite-calcite or quartz-carbonate chlorite fracture filling. Alteration consists of weak to strong sericite, weak to strong silica with areas of local pervasive silica flooding, weak to moderate chlorite and carbonate, and locally weak to strong fuchsite. Mineralization is hosted in or at the contacts of felsic porphyritic or fragmental intrusions with rhyolites, andesites (locally bleached), or gabbros.

 

Triple Lynx Zone

Mineralization in the Triple Lynx zone is typically characterized by trace to 30% disseminated, clustered or stringer pyrite, local visible gold, trace sphalerite, chalcopyrite, and galena, local quartz-tourmaline veins (up to 20%), local ptygmatic tourmaline veins, and local smoky quartz and quartz-carbonate veins. Alteration consists of weak to strong sericite, weak to strong silica with areas of local pervasive silica flooding, weak to moderate chlorite and carbonate, and locally weak to strong fuchsite. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.

 

Zone 27

Mineralization in Zone 27 is typically characterized by 5% to 50% disseminated, stringer, semi-massive or stockwork pyrite, ptygmatic tourmaline veins, quartz-tourmaline crustiform veins, and local quartz-carbonate veins. Local visible gold is observed as small specks or clusters with quartz veins. Alteration consist of moderate to strong sericite, weak to strong silica, weak chlorite and carbonate and locally weak fuchsite. Mineralization is hosted in strongly altered andesites or in or at the contact of the rhyolite.

 

Caribou Zone

Mineralization in the Caribou zone is typically characterized by trace to 20% disseminated, clustered or stringer pyrite, trace chalcopyrite, sphalerite, and local quartz-tourmaline and quartz-carbonate veins. Local visible gold and electrum is observed in the quartz veins or has remobilization in fractures filling. Alteration consists of weak to strong sericite, weak to moderate silica, and moderate carbonate and chlorite. Mineralization is hosted in andesites or rhyolites frequently at or near the contact of felsic porphyritic dikes.

 

Underdog Zone

Mineralization in the Underdog zone is typically characterized by trace to 30% disseminated, clustered, or stringer pyrite, local visible gold, quart-tourmaline veins, ptygmatic tourmaline veins and local quartz-carbonate veins. Alteration consists of weak to strong silica or weak to strong sericite. Mineralization is hosted in or at the rheological contacts between felsic porphyritic intrusions with strong alteration.

 

F-Zone

Mineralization in the F-Zone is typically characterised by trace to 10% disseminated or clustered pyrite, and local visible gold in fracture filling and quartz-carbonate veins. Alteration consists of medium to strong carbonate, weak to moderate sericite, and weak silica. Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining.

 

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of Osisko’s Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

 

Quality Control and Reporting Protocols

True width determination is estimated at 55-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

 

About the Windfall Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020, and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 19,2020 news release, certain of which are described in that news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog.  Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

 

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

 

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

 

CONTACT INFORMATION:

John Burzynski
President & Chief Executive Officer
Telephone (416) 363-8653

OSISKO TEMPORARILY SUSPENDS OPERATIONS AT WINDFALL

In Accordance with Quebec Government Province-Wide Covid-19 Shutdown

(Toronto, March 23, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) announced today that in response to the order of the Government of Quebec to close all non-essential businesses until April 13, 2020, it has suspended operations at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

To date, Osisko has had no suspected or confirmed cases of COVID-19, and has had a COVID-19 protocol in place since March 11 to protect its workforce.  The health and safety of Osisko’s workforce, their families and the communities in which we operate remains the number one concern for Osisko.  Osisko is committed to fully supporting safety measures for our workforce, families and communities.  Osisko thanks our workforce, partners and all stakeholders for their understanding and support, and looks forward to resuming operations as soon as possible.

 

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding the Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

 

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the term of any Government order, or of the suspension of operations described therein; mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward- looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the terms and duration of any government orders suspending or limiting operations that are applicable to Osisko; the responses of relevant governments to the COVID-19 outbreak and the effectiveness of such responses; the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

 

For further information please contact:

John Burzynski
President and Chief Executive Officer
Telephone: (416) 363-8653

 

OSISKO MINING APPOINTS ANDRÉE ST-GERMAIN TO BOARD OF DIRECTORS

(Toronto, March 13, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation“) is pleased to announce the appointment of Ms. Andrée St-Germain to the board of directors of the Corporation.

Ms. St-Germain is an experienced mining executive with an extensive background in banking, mining finance and financial management. Andrée holds an MBA (Honours) from the Schulich School of Business (York University) in Toronto, and is currently the Chief Financial Officer and Corporate Secretary of Integra Resources Corp. Her previous work experience includes Chief Financial Officer of Golden Queen Mining Co. Ltd. and several years as an investment banker at Dundee Capital Markets. Andrée has formerly held board positions with Barkerville Gold Mines Ltd. and IDM Mining Ltd., and currently serves on the board of Ascot Resources Ltd. and the Association for Mineral Exploration (AME). In 2019 Ms. St-Germain received the Young Mining Professional Eira Thomas award.

John Burzynski, Osisko’s President and Chief Executive Officer commented: On behalf of the board and the Corporation, we are pleased to welcome Andrée to Osisko. Andrée brings a strong and diverse experience in mining, finance and banking that will compliment our existing board members.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

For further information please contact:

John Burzynski President and Chief Executive Officer Telephone: (416) 363-8653

OSISKO EXTENTION AND INFILL DRILLING INTERSECTS HIGH GRADE AT LYNX AND TRIPLE LYNX

948 g/t Au Over 2.4 Metres

360 g/t Au over 2.1 Metres

(Toronto, March 9, 2020) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new drilling results from the ongoing definition and expansion drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

The program is currently focused on the Lynx deposit, exploration on the main mineralized zones, and deep exploration in the central areas of the mineralized intrusive system. Nineteen drills are active at Lynx and Triple Lynx.

Osisko President and Chief Executive Officer John Burzynski commented: “This first major set of new drill results following, and not included in, last month’s mineral resource estimate update continues to show high-grade results from Lynx in both infill and expansion holes. The drilling demonstrates very good potential for further growth of scale and grade at Lynx. While the focus of the drill program is on resource definition, the exploration team is excited about targeting several key areas of the Lynx deposit for growth potential, in particular a down-plunge projection where we believe Lynx Extension and Triple Lynx zones may intersect.”

The first results table below lists expansion intercepts located outside the February 2020 mineral resource estimate wireframes (see Osisko news release dated February 19, 2020).  The second table shows infill intercepts designed for resource definition. Significant new analytical results from 173 intercepts in 57 drill holes, 31 wedges, and 3 extensions of previously completed holes are presented below.

Selected high-grade intercepts from new results include: 948 g/t Au over 2.4 metres in OSK-19-2226; 360 g/t Au over 2.1 metres in OSK-W-19-2164; 72.0 g/t Au over 5.1 metres in OSK-W-19-2197-W1; 139 g/t Au over 2.0 metres in OSK-W-20-1104-W7; 71.2 g/t Au over 3.4 metres in OSK-W-19-1731-W4; 113 g/t Au over 2.0 metres in WST-19-0266; 19.0 g/t Au over 11.2 metres in OSK-W-19-2100-W5; 58.4 g/t Au over 3.2 metres in OSK-W-19-2123-W3; 92.6 g/t Au over 2.0 metres in OSK-W-19-991-W9; 51.0 g/t Au over 3.2 metres in WST-19-0198  and 41.1 g/t Au over 3.5 metres in OSK-W-19-991-W10. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Expansion Drilling

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)         cut to 100 g/t Zone Corridor
OSK-W-19-991-W10 1505.5 1509.0 3.5 41.1 34.2 Lynx 4 Lynx
OSK-W-19-1104-W5 810.0 812.0 2.0 10.7   Lynx Lynx
including 811.6 812.0 0.4 31.0  
  838.7 840.8 2.1 9.80   Lynx 4 Lynx
OSK-W-19-1104-W6 755.5 757.8 2.3 8.84   Lynx 4 Lynx
  822.4 824.6 2.2 9.16   Lynx 4 Lynx
OSK-W-19-1181-W12 1129.0 1133.2 4.2 5.01   Lynx 4 Lynx
including 1129.0 1130.0 1.0 10.2  
OSK-W-19-1731-W4 920.1 923.5 3.4 71.2 37.1 Lynx 4 Lynx
including 921.2 921.6 0.4 361 100
OSK-W-19-1949-W3 651.0 653.0 2.0 14.0   Lynx Lynx
including 652.3 653.0 0.7 39.5  
OSK-W-19-2059 685.0 687.0 2.0 3.27   Lynx 4 Lynx
  795.6 798.0 2.4 15.2   Lynx 4 Lynx
including 796.1 796.9 0.8 39.3  
OSK-W-19-2059-W1 588.0 590.0 2.0 3.19   Lynx 4 Lynx
  595.0 597.0 2.0 58.8 50.8 Lynx 4 Lynx
including 596.0 597.0 1.0 116 100
  822.8 824.8 2.0 7.07   Lynx 4 Lynx
including 824.1 824.4 0.3 25.7  
  827.0 829.0 2.0 3.24   Lynx 4 Lynx
including 827.5 828.0 0.5 12.0  
OSK-W-19-2067-W5 1134.4 1136.8 2.4 9.04   Triple Lynx Triple Lynx
  1174.0 1176.0 2.0 3.52   Triple Lynx Triple Lynx
OSK-W-19-2068 1000.8 1004.0 3.2 5.23   Lynx 4 Lynx
  1011.0 1013.0 2.0 6.67   Lynx 4 Lynx
OSK-W-19-2068-W2 804.2 806.9 2.7 4.54   Lynx 4 Lynx
  1021.0 1023.0 2.0 4.05   Lynx 4 Lynx
OSK-W-19-2068-W3 992.3 994.5 2.2 9.57   Lynx 4 Lynx
including 992.3 993.0 0.7 23.3  
OSK-W-19-2081 161.1 164.0 2.9 11.5   Vein  
including 161.1 161.5 0.4 82.1  
OSK-W-19-2100-W5 907.0 911.0 4.0 7.09   Triple Lynx Triple Lynx
  917.6 921.0 3.4 3.74   Triple Lynx Triple Lynx
  1032.5 1035.0 2.5 3.09   Triple Lynx Triple Lynx
OSK-W-19-2107-W2 730.4 734.1 3.7 3.95   Triple Lynx Triple Lynx
OSK-W-19-2108-W2 1299.6 1302.0 2.4 11.2   Triple Lynx Triple Lynx
including 1299.6 1300.1 0.5 52.9  
OSK-W-19-2123-W2 1198.0 1200.0 2.0 11.5   Triple Lynx Triple Lynx
including 1199.1 1199.4 0.3 73.4  
  1265.4 1268.2 2.8 10.9   Triple Lynx Triple Lynx
including 1267.6 1268.2 0.6 49.8  
OSK-W-19-2123-W3 1081.0 1083.0 2.0 5.55   Triple Lynx Triple Lynx
  1185.3 1187.5 2.2 4.24   Triple Lynx Triple Lynx
OSK-W-19-2139 565.3 567.4 2.1 6.53   Triple Lynx Lynx
OSK-W-19-2139-W3 882.0 884.1 2.1 3.38   Triple Lynx Triple Lynx
  910.0 912.0 2.0 32.4 15.3 Triple Lynx Triple Lynx
including 910.9 911.2 0.3 214 100
  924.0 926.0 2.0 3.72   Triple Lynx Triple Lynx
  1005.0 1007.0 2.0 3.34   Triple Lynx Triple Lynx
OSK-W-19-2139-W4 993.0 995.2 2.2 49.9 39.7 Triple Lynx Triple Lynx
  993.7 994.0 0.3 175 100
OSK-W-19-2164 950.0 952.1 2.1 360 48.8 Triple Lynx Triple Lynx
including 950.0 951.0 1.0 754 100
OSK-W-19-2164-W1 931.6 933.6 2.0 13.4   Triple Lynx Triple Lynx
including 932.3 932.6 0.3 86.6  
OSK-W-19-2197 878.0 881.0 3.0 5.11   Triple Lynx Lynx
  904.7 906.7 2.0 12.0   Triple Lynx Lynx
including 904.7 905.4 0.7 29.3  
OSK-W-19-2197-W1 784.5 789.6 5.1 72.0 23.6 Triple Lynx Triple Lynx
including 789.0 789.6 0.6 511 100
  822.4 826.5 4.1 7.10   Triple Lynx Triple Lynx
including 825.9 826.5 0.6 29.4  
  845.0 847.1 2.1 5.99   Triple Lynx Triple Lynx
OSK-W-19-2202 942.0 944.0 2.0 3.21   Triple Lynx Triple Lynx
including 943.2 944.0 0.8 7.88  
OSK-W-19-2203 71.5 73.9 2.4 55.2 18.2 Lynx Lynx
including 72.9 73.2 0.3 396 100
OSK-W-19-2216 72.4 74.4 2.0 5.02   Lynx Lynx
OSK-W-19-2217 865.4 867.5 2.1 4.61   Triple Lynx Triple Lynx
  876.7 878.8 2.1 13.4   Triple Lynx Triple Lynx
including 878.0 878.8 0.8 29.3  
OSK-W-19-2225 144.7 148.6 3.9 18.8   Lynx Lynx
including 144.7 145.4 0.7 76.0  
OSK-W-19-2226 71.6 74.0 2.4 15.4   Lynx Lynx
OSK-W-19-2227 31.7 34.0 2.3 4.24   Lynx Lynx
  49.9 51.9 2.0 5.63   Lynx Lynx
 OSK-W-20-2100-W6 984.9 987.0 2.1 11.5   Triple Lynx Triple Lynx
including 986.5 987.0 0.5 38.4  
  1024.0 1026.3 2.3 4.10   Triple Lynx Triple Lynx
including 1025.0 1025.4 0.4 22.6  
OSK-W-20-2202-W1 860.0 862.6 2.6 3.35   Triple Lynx Triple Lynx
  891.0 893.0 2.0 6.52   Triple Lynx Triple Lynx
including 891.0 891.4 0.4 29.7  
OSK-W-20-2239 130.0 132.0 2.0 4.43   Lynx Lynx
including 130.7 131.4 0.7 12.5  
OSK-W-20-2240 120.6 122.6 2.0 3.93   Lynx Lynx
including 120.6 120.9 0.3 26.1  
WST-19-0265B 2.0 4.3 2.3 3.02   Lynx Lynx
  39.0 41.0 2.0 5.63   Lynx Lynx
including 40.0 40.3 0.3 37.0  
WST-19-0267 2.0 4.0 2.0 3.22   Lynx Lynx
WST-19-0274 77.8 80.0 2.2 13.2   Lynx Lynx
including 79.0 80.0 1.0 28.6  
WST-19-0306 93.0 95.0 2.0 5.49   Lynx Lynx
including 94.0 94.3 0.3 35.4  
WST-19-0307 128.2 130.2 2.0 10.8   Lynx Lynx
WST-20-0284 65.7 67.8 2.1 3.64   Lynx Lynx
WST-20-0287 85.6 88.0 2.4 13.4 12.9 Lynx Lynx
including 87.7 88.0 0.3 105 100
WST-20-0292  124.8 127.0 2.2 28.5   Lynx Lynx
including 125.3 126.0 0.7 80.7  
WST-20-0329 137.6 140.0 2.4 4.25   Lynx Lynx
including 137.9 138.2 0.3 32.8  
WST-20-0385A  128.0 130.0 2.0 19.3   Lynx Lynx
including 128.7 129.2 0.5 75.8  
OSK-W-17-1258 381.2 383.5 2.3 3.54   Lynx Lynx
  401.0 403.8 2.8 3.02   Lynx Lynx
including 403.1 403.8 0.7 12.0  
  603.6 606.0 2.4 15.2   Lynx Lynx
including 603.6 604.2 0.6 50.5  
OSK-W-18-1738 472.0 474.0 2.0 6.46   Lynx Lynx
including 473.0 473.5 0.5 25.5  

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

 

Infill Drilling

Hole No. From (m) To (m) Interval (m) Au (g/t) uncut Au (g/t)         cut to 100 g/t Zone Corridor
OSK-W-18-1604 833.0 836.7 3.7 29.1 15.1 Lynx_350 Lynx
including 834.6 834.9 0.3 272 100
OSK-W-18-1738 427.0 429.4 2.4 5.31   Lynx_323 Lynx
including 428.0 428.4 0.4 13.9  
OSK-W-19-991-W9 1479.9 1481.9 2.0 92.6 56.9 Lynx_349 Lynx
including 1479.9 1480.4 0.5 243 100
OSK-W-19-1731-W2 927.7 929.8 2.1 31.8   Lynx_348 Lynx
OSK-W-19-1731-W3 533.0 536.0 3.0 5.74   Lynx_304 Lynx
including 533.0 533.5 0.5 18.7  
  641.6 643.9 2.3 4.47   Lynx_321 Lynx
OSK-W-19-1731-W4 907.0 909.0 2.0 12.9   Lynx_329 Lynx
including 907.0 907.5 0.5 50.1  
OSK-W-19-1949-W4 1086.7 1088.8 2.1 5.61   Lynx_330 Lynx
OSK-W-19-1963-W3 1431.0 1433.8 2.8 7.29   Lynx_345 Lynx
including 1432.7 1433.1 0.4 44.8  
OSK-W-19-2059 563.0 565.0 2.0 7.20   Lynx_321 Lynx
  846.9 852.0 5.1 21.3   Lynx_327 Lynx
including 850.0 852.0 2.0 41.2  
OSK-W-19-2059-W1 780.4 782.4 2.0 9.43   Lynx_333 Lynx
  867.4 869.4 2.0 50.0   Lynx_329 Lynx
  881.0 883.4 2.4 7.14   Lynx_348 Lynx
OSK-W-19-2067-W5 1077.0 1079.0 2.0 4.68   Lynx_368 Triple Lynx
  1148.0 1151.0 3.0 8.24   Lynx_370 Triple Lynx
including 1150.7 1151.0 0.3 46.8  
OSK-W-19-2068 481.0 483.3 2.3 9.57   Lynx_304 Lynx
including 481.5 481.9 0.4 45.2  
  915.5 917.7 2.2 38.4 32.6 Lynx_348 Lynx
including 917.3 917.7 0.4 132 100
OSK-W-19-2068-W2 897.0 901.1 4.1 16.5   Lynx_329 Lynx
including 900.6 901.1 0.5 36.9  
OSK-W-19-2070 909.9 914.6 4.7 4.08   Lynx_346 Lynx
OSK-W-19-2077 755.4 761.0 5.6 4.56   Lynx_363 Triple Lynx
including 755.4 756.0 0.6 14.1  
 OSK-W-19-2100-W5 987.8 999.0 11.2 19.0 8.64 Lynx_363 Triple Lynx
including 998.6 999.0 0.4 389 100
OSK-W-19-2107-W1 579.0 584.0 5.0 4.88   Lynx_331 Lynx
OSK-W-19-2123-W3 1190.5 1192.5 2.0 5.11   Lynx_370 Triple Lynx
including 1191.1 1191.7 0.6 14.6  
  1194.5 1196.6 2.1 4.06   Lynx_370 Triple Lynx
  1198.3 1201.5 3.2 58.4 37.7 Lynx_370 Triple Lynx
including 1198.6 1199.2 0.6 210 100
OSK-W-19-2139-W4 898.7 902.0 3.3 23.3   Lynx_361 Triple Lynx
  913.0 915.0 2.0 6.87   Lynx_363 Triple Lynx
including 913.6 914.1 0.5 25.5  
OSK-W-19-2164 837.4 839.9 2.5 3.26   Lynx_376 Triple Lynx
OSK-W-19-2164-W1 777.0 780.4 3.4 6.35   Lynx_367 Triple Lynx
including 779.4 780.4 1.0 17.0  
OSK-W-19-2169 1031.8 1033.8 2.0 9.76   Lynx_330 Lynx
including 1031.8 1032.1 0.3 55.7  
OSK-W-19-2201 48.8 51.0 2.2 14.1   Lynx_311 Lynx
including 49.4 50.6 1.2 25.6  
OSK-W-19-2208 56.0 58.1 2.1 40.4 28.7 Lynx_318 Lynx
including 57.5 58.1 0.6 141 100
OSK-W-19-2210 97.3 99.5 2.2 11.7   Lynx_311 Lynx
including 98.0 98.5 0.5 49.6  
  101.1 103.6 2.5 19.0   Lynx_311 Lynx
including 102.0 102.7 0.7 65.5  
OSK-W-19-2213 103.1 105.5 2.4 18.0   Lynx_311 Lynx
including 103.4 104.3 0.9 40.5  
OSK-W-19-2215 71.0 73.5 2.5 4.71   Lynx_304 Lynx
  91.7 94.7 3.0 39.7 26.8 Lynx_311 Lynx
including 91.7 92.0 0.3 115 100
and 94.2 94.7 0.5 169 100
OSK-W-19-2219 135.0 137.0 2.0 13.6   Lynx_311 Lynx
including 135.6 135.9 0.3 68.2  
OSK-W-19-2225 179.2 181.2 2.0 4.57   Lynx_318 Lynx
including 179.2 179.8 0.6 15.0  
OSK-W-19-2226 49.0 51.2 2.2 4.27   Lynx_311 Lynx
  55.7 58.1 2.4 948 33.8 Lynx_311 Lynx
including 55.7 56.2 0.5 377 100
and 57.8 58.1 0.3 6950 100
OSK-W-19-2230 105.5 108.0 2.5 4.18   Lynx_304 Lynx
including 106.6 107.1 0.5 20.1  
  154.5 156.6 2.1 3.50   Lynx_311 Lynx
OSK-W-19-2232 92.5 94.9 2.4 3.01   Lynx_318 Lynx
OSK-W-20-1104-W7 533.0 535.0 2.0 139 21.7 Lynx_322 Lynx
including 533.0 533.3 0.3 885 100
  802.0 804.0 2.0 6.04   Lynx_347 Lynx
including 802.7 803.4 0.7 16.0  
  808.1 810.1 2.0 3.52   Lynx_347 Lynx
including 808.6 808.9 0.3 16.8  
OSK-W-20-1731-W5 544.0 546.0 2.0 6.86   Lynx_304 Lynx
including 544.8 545.3 0.5 26.4  
OSK-W-20-2059-W2 596.0 598.5 2.5 6.05   Lynx_321 Lynx
including 597.6 598.0 0.4 25.7  
OSK-W-20-2100-W6 954.0 957.0 3.0 3.55   Lynx_363 Triple Lynx
OSK-W-20-2170-W2 981.0 984.0 3.0 6.81   Lynx_363 Triple Lynx
  988.0 990.0 2.0 4.66   Lynx_363 Triple Lynx
  1011.5 1015.1 3.6 9.47   Lynx_364 Triple Lynx
including 1011.5 1012.1 0.6 29.0  
OSK-W-20-2238 94.1 96.2 2.1 8.26   Lynx_304 Lynx
including 94.1 94.5 0.4 41.6  
  151.9 154.0 2.1 3.36   Lynx_311 Lynx
including 152.7 153.3 0.6 10.7  
OSK-W-20-2240 128.6 131.0 2.4 31.2 31.1 Lynx_311 Lynx
including 129.4 129.7 0.3 101 100
OSK-W-20-2241 91.9 93.9 2.0 4.62   Lynx_304 Lynx
including 92.3 92.7 0.4 21.7  
  140.2 144.0 3.8 4.29   Lynx_311 Lynx
WST-19-0154 47.0 49.1 2.1 6.85   Lynx_308 Lynx
including 48.0 48.6 0.6 18.8  
WST-19-0198 69.2 72.4 3.2 51.0 31.9 Lynx_311 Lynx
including 71.8 72.4 0.6 202 100
WST-19-0213 85.4 87.6 2.2 15.6   Lynx_311 Lynx
including 85.4 86.1 0.7 44.1  
  89.0 91.4 2.4 4.85   Lynx_311 Lynx
including 90.1 90.4 0.3 35.3  
WST-19-0228 81.0 83.0 2.0 25.1 20.4 Lynx_308 Lynx
including 82.1 82.5 0.4 124 100
WST-19-0255 68.0 70.4 2.4 13.0   Lynx_311 Lynx
including 70.1 70.4 0.3 49.8  
  76.0 78.0 2.0 6.97   Lynx_308 Lynx
WST-19-0259 70.6 76.8 6.2 9.96 9.92 Lynx_311 Lynx
including 75.0 75.5 0.5 101 100
WST-19-0265B 51.0 54.4 3.4 9.04   Lynx_304 Lynx
including 54.0 54.4 0.4 32.5  
  85.0 87.0 2.0 27.3   Lynx_306 Lynx
including 85.7 86.3 0.6 90.7  
WST-19-0266 8.0 10.0 2.0 3.95   Lynx_310 Lynx
  53.4 55.4 2.0 113 33.7 Lynx_304 Lynx
including 54.5 55.1 0.6 363 100
  92.8 95.0 2.2 58.5 22.9 Lynx_306 Lynx
including 93.4 93.8 0.4 296 100
WST-19-0267 33.0 35.0 2.0 6.29   Lynx_319 Lynx
including 33.6 34.1 0.5 25.0  
  84.7 87.0 2.3 13.0   Lynx_306 Lynx
including 84.7 85.0 0.3 33.1  
WST-19-0269 62.2 64.5 2.3 6.30   Lynx_304 Lynx
WST-19-0270 91.0 93.0 2.0 3.14   Lynx_306 Lynx
WST-19-0273A 107.0 109.2 2.2 19.4 18.6 Lynx_306 Lynx
including 107.5 107.9 0.4 105 100
WST-19-0305 89.2 91.3 2.1 44.2 38.5 Lynx_308 Lynx
including 90.5 91.3 0.8 115 100
  94.0 96.1 2.1 3.14   Lynx_310 Lynx
  115.0 117.0 2.0 27.6 19.1 Lynx_304 Lynx
including 115.7 116.0 0.3 157 100
WST-19-0306 121.8 123.8 2.0 25.9 15.6 Lynx_304 Lynx
including 122.7 123.0 0.3 169 100
  136.5 138.6 2.1 6.53   Lynx_306 Lynx
including 136.5 137.3 0.8 16.8  
WST-19-0307 76.0 78.5 2.5 3.68   Lynx_311 Lynx
  133.2 135.2 2.0 47.2 38.2 Lynx_306 Lynx
including 133.9 134.5 0.6 130 100
WST-19-0324 87.5 90.0 2.5 3.36   Lynx_311 Lynx
including 88.5 89.0 0.5 15.6  
WST-19-0325 123.0 125.0 2.0 9.52   Lynx_304 Lynx
including 123.0 123.8 0.8 23.7  
WST-19-0327 94.3 96.5 2.2 13.9   Lynx_311 Lynx
including 94.3 95.1 0.8 37.7  
WST-20-0284 50.0 52.0 2.0 5.37   Lynx_311 Lynx
WST-20-0287 51.9 54.2 2.3 31.4 28.3 Lynx_311 Lynx
including 52.3 52.9 0.6 112 100
  105.4 112.0 6.6 19.1 18.3 Lynx_319 Lynx
including 105.4 105.7 0.3 117 100
and 111.0 112.0 1.0 85.0  
  140.0 142.0 2.0 13.2   Lynx_304 Lynx
including 140.8 141.2 0.4 62.5  
WST-20-0288 52.2 54.2 2.0 6.62   Lynx_311 Lynx
WST-20-0290 55.0 57.3 2.3 20.3   Lynx_311 Lynx
including 56.7 57.3 0.6 76.9  
  115.4 117.6 2.2 4.19   Lynx_319 Lynx
  135.6 139.3 3.7 10.7   Lynx_304 Lynx
WST-20-0291 55.5 57.5 2.0 5.11   Lynx_311 Lynx
WST-20-0292 51.5 53.7 2.2 9.31   Lynx_311 Lynx
including 51.5 52.5 1.0 18.8  
WST-20-0332 92.0 94.6 2.6 14.3   Lynx_304 Lynx
including 92.0 92.3 0.3 53.3  
WST-20-0375 144.4 147.2 2.8 25.9   Lynx_304 Lynx
including 145.7 146.4 0.7 81.8  
WST-20-0385A 119.1 121.4 2.3 7.53   Lynx_304 Lynx
including 120.1 120.5 0.4 39.6  

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

 

 

Drill hole location

Hole Number Azimuth (°) Dip (°) Length (m) UTM E UTM N Elevation Section
OSK-W-17-1258 126 -51 1128 452972 5435211 416 3275
OSK-W-18-1604 142 -52 909 453219 5435347 407 3575
OSK-W-18-1738 329 -69 815 453460 5434986 396 3600
OSK-W-19-991-W9 128 -58 1562 453980 5435993 401 4550
OSK-W-19-991-W10 128 -58 1686 453980 5435993 401 4550
OSK-W-19-1104-W5 142 -50 920 453383 5435455 402 3775
OSK-W-19-1104-W6 142 -50 869 453383 5435455 402 3775
OSK-W-19-1181-W12 133 -58 1371 453789 5435790 401 4275
OSK-W-19-1731-W2 139 -51 996 453383 5435518 409 3800
OSK-W-19-1731-W3 139 -51 905 453383 5435518 409 3800
OSK-W-19-1731-W4 139 -51 975 453383 5435518 409 3800
OSK-W-19-1949-W3 105 -57 1326 453440 5435479 401 3825
OSK-W-19-1949-W4 105 -57 1298 453440 5435479 401 3825
OSK-W-19-1963-W3 123 -58 1460 453761 5435816 401 4275
OSK-W-19-2059 131 -52 993 453446 5435477 400 3825
OSK-W-19-2059-W1 131 -52 1041 453446 5435477 400 3825
OSK-W-19-2067-W5 123 -53 1226 453241 5435697 416 3750
OSK-W-19-2068 116 -53 1098 453317 5435387 402 3675
OSK-W-19-2068-W2 116 -53 1046 453317 5435387 402 3675
OSK-W-19-2068-W3 116 -53 1022 453317 5435387 402 3675
OSK-W-19-2070 112 -52 990 453502 5435523 401 3900
OSK-W-19-2077 127 -57 1123 453147 5435489 418 3575
OSK-W-19-2081 152 -47 291 452838 5435047 407 3100
OSK-W-19-2100-W5 122 -47 1134 453093 5435726 419 3650
OSK-W-19-2107-W1 23 -70 1059 453426 5434778 396 3475
OSK-W-19-2107-W2 23 -70 932 453426 5434778 396 3475
OSK-W-19-2108-W2 117 -53 1578 453215 5435858 414 3825
OSK-W-19-2123-W2 126 -57 1367 453231 5435774 400 3775
OSK-W-19-2123-W3 126 -57 1284 453231 5435774 400 3775
OSK-W-19-2139 115 -52 1149 452980 5435549 420 3450
OSK-W-19-2139-W3 115 -52 1169 452980 5435549 420 3450
OSK-W-19-2139-W4 115 -52 1011 452980 5435549 420 3450
OSK-W-19-2164 130 -52 1053 452943 5435566 419 3425
OSK-W-19-2164-W1 130 -52 1098 452943 5435566 419 3425
OSK-W-19-2169 130 -50 1268 453215 5435512 410 3650
OSK-W-19-2197 121 -48 1059 453087 5435527 418 3550
OSK-W-19-2197-W1 121 -48 1104 453087 5435527 418 3550
OSK-W-19-2201 331 -46 93 453179 5434981 398 3350
OSK-W-19-2202 127 -54 1176 452999 5435606 424 3500
OSK-W-19-2203 329 -50 111 453220 5434993 399 3400
OSK-W-19-2208 334 -45 81 453212 5435008 398 3400
OSK-W-19-2210 332 -50 135 453235 5434970 398 3400
OSK-W-19-2213 325 -48 144 453235 5434970 398 3400
OSK-W-19-2215 329 -51 204 453254 5434980 398 3425
OSK-W-19-2216 329 -45 129 453235 5434971 399 3400
OSK-W-19-2217 134 -48 1172 452943 5435566 419 3425
OSK-W-19-2219 330 -45 174 453286 5434966 398 3450
OSK-W-19-2225 334 -52 189 453286 5434966 398 3450
OSK-W-19-2226 322 -55 126 453238 5435013 398 3425
OSK-W-19-2227 332 -45 108 453250 5435018 398 3425
OSK-W-19-2230 332 -53 177 453298 5434984 398 3450
OSK-W-19-2232 337 -59 123 453251 5435018 398 3425
OSK-W-20-1104-W7 142 -50 867 453383 5435455 402 3775
OSK-W-20-1731-W5 139 -51 1028 453383 5435518 409 3800
OSK-W-20-2059-W2 131 -52 933 453446 5435477 400 3825
OSK-W-20-2100-W6 122 -47 1260 453093 5435726 419 3650
OSK-W-20-2170-W2 128 -59 1188 453425 5435657 413 3900
OSK-W-20-2202-W1 127 -54 1259 452999 5435606 424 3500
OSK-W-20-2238 328 -51 189 453267 5434960 398 3425
OSK-W-20-2239 322 -48 165 453267 5434960 398 3425
OSK-W-20-2240 323 -45 167 453267 5434960 398 3425
OSK-W-20-2241 328 -49 165 453267 5434960 398 3425
WST-19-0154 175 26 124 453288 5435116 206 3525
WST-19-0198 177 3 133 453176 5435125 174 3425
WST-19-0213 131 -21 193 453178 5435126 174 3425
WST-19-0228 128 14 151 453216 5435115 224 3450
WST-19-0255 145 24 93 453216 5435115 224 3450
WST-19-0259 164 26 97 453216 5435114 224 3450
WST-19-0265B 166 1 109 453298 5435066 204 3500
WST-19-0266 165 -11 121 453298 5435066 204 3500
WST-19-0267 173 5 109 453298 5435066 204 3500
WST-19-0269 176 -4 118 453298 5435066 204 3500
WST-19-0270 179 6 115 453298 5435066 204 3500
WST-19-0273A 138 11 114 453290 5435116 206 3525
WST-19-0274 120 50 119 453290 5435116 209 3525
WST-19-0305 133 27 133 453217 5435115 224 3450
WST-19-0306 149 31 151 453217 5435115 225 3450
WST-19-0307 159 32 154 453217 5435115 225 3450
WST-19-0324 168 38 120 453216 5435115 225 3450
WST-19-0325 121 27 144 453217 5435115 225 3450
WST-19-0327 129 34 147 453218 5435115 225 3450
WST-20-0284 162 -21 82 453228 5435126 135 3475
WST-20-0287 153 5 220 453228 5435126 136 3475
WST-20-0288 152 -7 229 453228 5435127 135 3475
WST-20-0290 140 2 223 453229 5435127 136 3475
WST-20-0291 140 -9 160 453229 5435127 135 3475
WST-20-0292 141 -22 282 453229 5435127 135 3475
WST-20-0329 147 37 144 453217 5435115 225 3450
WST-20-0332 139 -16 219 453411 5435230 114 3675
WST-20-0375 156 -49 186 453493 5435287 116 3775
WST-20-0385A 166 -36 164 453493 5435287 116 3775

 

Lynx Zone

Mineralization in the Lynx zone is typically characterized by trace to 15% disseminated, clustered or stringer pyrite (locally up to 70%), local visible gold, trace to 3% sphalerite, chalcopyrite, and galena, local ptygmatic pyrite-tourmaline or tourmaline veinlets, quartz-carbonate veins (locally crustiform), smoky quartz veins and veinlets, and local chlorite-calcite or quartz-carbonate chlorite fracture filling. Alteration consists of weak to strong sericite, weak to strong silica with areas of local pervasive silica flooding, weak to moderate chlorite and carbonate, and locally weak to strong fuchsite. Mineralization is hosted in or at the contacts of felsic porphyritic or fragmental intrusions with rhyolites, andesites (locally bleached), or gabbros.

 

Triple Lynx Zone

Mineralization in the Triple Lynx zone is typically characterized by trace to 30% disseminated, clustered or stringer pyrite, local visible gold, trace sphalerite, chalcopyrite, and galena, local quartz-tourmaline veins (up to 20%), local ptygmatic tourmaline veins, and local smoky quartz and quartz-carbonate veins. Alteration consists of weak to strong sericite, weak to strong silica with areas of local pervasive silica flooding, weak to moderate chlorite and carbonate, and locally weak to strong fuchsite. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.

 

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of Osisko’s Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

 

Quality Control and Reporting Protocols

True width determination is estimated at 55-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

 

About the Windfall Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in this news release and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release, certain of which are described in this news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog.  Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

 

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

 

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall Lake gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall Lake gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall Lake gold deposit; the projected capital expenditures of mining activities at the Windfall Lake gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property and royalty interests in the Windfall Lake gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

 

CONTACT INFORMATION:

John Burzynski
President & Chief Executive Officer
Telephone (416) 363-8653